Amoebozoa is a major taxonomic group containing about 2,400 described species of amoeboid protists, often possessing blunt, fingerlike, lobose pseudopods and tubular mitochondrial cristae. In most classification schemes, Amoebozoa is ranked as a phylum within either the kingdom Protista or the kingdom Protozoa.
Some protozoa have two-phase life cycles, alternating between proliferative stages (e.g., trophozoites) and dormant cysts. As cysts, protozoa can survive harsh conditions, such as exposure to extreme temperatures or harmful chemicals, or long periods without access to nutrients, water, or oxygen for periods of time.
The British Freshwater Rhizopoda and Heliozoa (1905-1921) Cash, J. & Wailes, G.H. (1905). The British Freshwater Rhizopoda and Heliozoa, Vol. I, Rhizopoda, Part I. London: Printed for the Ray Scociety. Cash, J. & Wailes, G.H. (1909). The British Freshwater Rhizopoda and Heliozoa, Vol. II, Rhizopoda, Part II.
Sarcodina /Sar·co·di·na/ (-di´nah) a subphylum of protozoa consisting of organisms that alter their body shape and that move about and acquire food either by means of pseudopodia or by protoplasmic flow without producing discrete pseudopodia.